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Cheap flights from Chicago (CHI) to Seattle (BFI)

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0 Children (2~11)
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How to find the cheapest flight from Chicago (CHI) to Seattle (BFI)

How to find the cheapest flight from Chicago (CHI) to Seattle (BFI)
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How to find the cheapest flight from Chicago (CHI) to Seattle (BFI)
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How to find the cheapest flight from Chicago (CHI) to Seattle (BFI)
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Cheap flights from Chicago to Seattle in July , August 2026

28 Jul - 21 Aug $ 810.00
CHI
Chicago
Frontier Airlines
2 STOPS
BFI
Seattle
BFI
Seattle
Frontier Airlines
2 STOPS
CHI
Chicago
Pick dates
28 Jul - 14 Aug $ 813.00
CHI
Chicago
Frontier Airlines
2 STOPS
BFI
Seattle
BFI
Seattle
Frontier Airlines
2 STOPS
CHI
Chicago
Pick dates
28 Jul - 28 Aug $ 813.00
CHI
Chicago
Frontier Airlines
2 STOPS
BFI
Seattle
BFI
Seattle
Frontier Airlines
2 STOPS
CHI
Chicago
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Last minute flights from Chicago to Seattle

28 Jul - 31 Jul $ 969.00
CHI
Chicago
Frontier Airlines
2 STOPS
BFI
Seattle
BFI
Seattle
Frontier Airlines
2 STOPS
CHI
Chicago
Pick dates
27 Jul - 31 Jul $ 1,026.00
CHI
Chicago
Frontier Airlines
2 STOPS
BFI
Seattle
BFI
Seattle
Frontier Airlines
2 STOPS
CHI
Chicago
Pick dates
30 Jul - 31 Jul $ 1,068.00
CHI
Chicago
Frontier Airlines
2 STOPS
BFI
Seattle
BFI
Seattle
Frontier Airlines
2 STOPS
CHI
Chicago
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One-way flights to Seattle from Chicago

9:57 PM - 6:45 PM
Air Excursions
2 Stops
23h 38m
CHI - BFI
$ 476
Kiwi
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9:57 PM - 8:25 PM
Air Excursions
2 Stops
25h 18m
CHI - BFI
$ 499
Kiwi
Pick dates
7:15 AM - 9:25 PM
Air Excursions
2 Stops
17h
CHI - BFI
$ 576
Kiwi
Pick dates

How to find the cheapest flight from Chicago (CHI) to Seattle (BFI)

Related info for your journey
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How to find the cheapest flight from Chicago (CHI) to Seattle (BFI)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from Chicago (CHI) to Seattle (BFI)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.